I have an original Tiger 10.4 install disk for a G-5 computer. When I boot up the computer with the install disk everything is fine. However when I run Disk Utility the only option I have for formatting the partitions is MS-DOS or free space. No Mac OS X formats are offered. If I run a 10.5 Install disk I am offered the options in Disk Utility to use Mac OS X HDD formatting. Any one have any idea what I need to do to get DU in Tiger to format the HDD in Mac OS X format? BTW, the HDD's in the unit are pre-formatted in Windows NTFS if that makes a difference. I just want to make sure Tiger supports Mac OS X format before doing anything else.